Concrete-road-finishing machine



Dec. 21 1926. 1,611,412

E. G. CARR CONCRETE ROAD FINISHING MACHINE Filed August 11, 1922 3Sheets-Sheet 1 INVENTOR. M W W4 A TTORNEYJ'.

Dec. 21 1926. 1,611,412

E. G. CARR CONCRETE ROAD FINISHING MACHINE Filed August 11, 1922 3Sheets-Sheet INVENTOR.

E. G. CARR CONCRETE ROAD FINISHING MACHINE Dec. '21, 1926.

1922 3 Sheets-Sheet 3 F i led August 11 r L m: 1

R MH

- INVENTOR.

ATTORNEYS.

Patented Dec. 21, 1926.

UNITED STATES EDWARD G. CARR, OF CHICAGO, ILLINOIS.

CONCRETE-ROAD-FINISHING MACHINE. H E I E D Application filed. August 11,1922. Serial No. 581,043.

This invention relates to concrete road finishing machines, and theobject of the invention is to improve the construction and operation ofconcrete road finishing machines in the manner to be hereinafterdescribed and claimed.

Referring to the drawings which accompany this specification and form apart hereof, which drawings illustrate an embodiment of this invention,and on which drawings the same reference characters are used todesignate the same parts wherever they may appear in each of theseveralviews, Fig. 1 is a plan view of a concrete road finishing machine, partsbeing broken away; Fig. 2' is a side elevation of parts of the machine;Fig. 3 is a. front elevation of parts of the machine; Fig. 4; is avertical section, on an enlarged scale, taken on the line 44 on Fig. 1,looking in the direction indicated by the arrows' Fi s. 5 and 6 areviews similar to Fig. 4, but showing the smoothing templet tilted todifferent positions; Fig. 7 is a vertical section taken on the line 77on Fig. 1, looking in the direction indicated by the arrows; Fig. 8 isan elevation of parts of the machine, the line of sight being directedlongitudinally of the smoothing templet; Fig. 9 is a plan view of an endof the spreading templet and associated parts; Fig. 10 is a verticalsection taken on the line 101O on Fig. 2, looking in the directionindicated by the arrows; Fig. 11 is an elevation of parts of thesmoothing templet; and Fig. 12 is a perspective view of an end of thesmoothing templet.

Referring to the drawings, the reference numeral 1 designates a frame ofany suitable construction which is mounted on wheels 2. The wheels 2 areadapted to run upon the fern-1s 3 and 4 and may be rotated by the motor5 to propel the machine in either direction. The motor 5 is illustratedby the drawings as an internal combustion motor, or engine, which runs,or turns over, in only one direction and to provide for the propulsionof the machine in either direction a sprocket wheel 6' and sprocketchain 7 can rotate the sprocket wheel 8, the shaft 9, the gear 10, andthe sprocket wheel 11. The sprocket wheel 8, the gear 10, and thesprocket wheel 11 are all connected to the shaft 9 in any suitablemanner so that these several parts rotate, as a unit in unison. The gear10 meshes with the gear 12, which is a loose gear on the shaft 13, andthe sprocket wheel 15, which is a loose sprocket wheel on the shaft 13,is connected with the sprocket wheel 11 by the sprocket chain 14. Thegear 12 1s provided with a clutch member 16, and the sprocket wheel 15is provided with a clutch member 17. It will, of course, be understoodthe the gear 12 and the sprocket wheel 15 are restrained fromlongitudinal movements on the shaft 13 while being free to permit ofrelative movements of rotation. A clutch 18 is secured to the shaft 13so as to rotate therewith while-being movable longitudinally thereof,and the clutch 18 may be moved by a clutch-rod 19 into engagement eitherwith the clutch member 16 or the clutch'member 17, or the clutch 18 maybe moved to an intermediate or neutral position where it is disengagedfrom both of the clutch members 16 and 17. With the motor 5'runn1ng, itis thus possible to move the clutch 18 to such positions that the shaft13' can be rotated in either direction, or can be prevented from beingrotated, 50 that the machine can be propelled forward or back ward, orcan be stopped. The shaft 18 is extended to rotate longitudinal shafts20, one at each side of the machine, by gear mechanism contained inhousings 21 and 22, and the longitudinal shafts are geared to the wheels2 by gear mechanism contained in journal boxes 23.

The frame 1 supports a spreading templet 24 and a float or finisher 25.A smoothing templet 26 is located between the spreading templet 24 andthe float 25, and is so arranged that it may be supported by the forms 3and 4, or may be raised from the forms and be supported from the frame 1of the machine. I

The float or finisher consists of a piece of textile fabric, or othersuitable material, secured to a frame 27. The frame 27 is supported bybearings 28, which are secured to the frame 1, and the frame 27 is bothreciprocable and rotatable in the bearings 28 so that it can bereciprocated longitudinally or can be turned up and down to re move thefloat 25 from the concrete surface or to place it in contact with theconcrete surface.

The spreading templet 24, the float or finisher 25, and the smoothingtemplet- 26 are severally rcciprocable longitu inally of themselves, andmay be reciprocated in the following manner. A crank device, such as aneccentric 29 for example, may be loosely mounted on the shaft 13 butrestrained from longitudinal movements with respect thereto, and beprovided with a clutch member 30 adapted to be engaged by a clutch 31,which is splined, for example, to the shaft 13. The.

with the motion transmitting device by a link 38 which is looselypivoted at both ends to permit the smoothing te1nplet'26 to boreciprocated and raised or lowered. lever 39 is pivoted to the frame 1 bythe p vot 40 and is lootely, pivotally connected with the smoothingtemplet 26 by a link 41 at one end, while its other end is connectedwith the frame 27 in any suitable manner as, for ex ample, by beingbifurcated and straddling the frame 27 between two collars 42 and 43which are secured to the frame 27. The extent of movement of thespreading templet 24, the smoothing templet 26 and the float or finisher25, in their several longitudinal reciprocations, can be readilyprovided for by the distances the links 37 and 38 are located from thepivot 36, and the distance the link 41 is located from the pivot 40.

It is preferred that the spreading templet 24 reciprocate horizontallyand it may be supported upon antifrietion rollers 44 which may run inguides 45 secured to the frame 1. The antifriction rollers 44 are placedupon the horizontal ends of cranks 46 and 47, upon which the spreadingtemplet 24 is hung. The cranks 46 and 47 are provided with operatinglevers 48 and 49 which have hand grips 50 and 51 to control pawls whichare adapted to seat in notches in sectors 52 and 53 which are secured tothe spreading templet 24. It will be evident that, by mampulating theoperating'levers 48 and 49, the cranks 46 and 47 can be turned so as toelevate or lower the spreading templet 24. The operating levers 48 and49 are connected for simultaneous movements by a rod 54 so that thespreading templet can be raised or lowered from either side of themachine to suit the convenience of the operator, and a ring 55 may beslipped over one operating lever and its hand gri to hold the pawl forthat hand grip out o engagement with the sector for that particularoperating lever. Antifrict-ion rollers may be provided to take thrustfrom the spreading templet 24. Fig. l of the drawings shows two suchantifriction rollers 56 connected to the frame 1- The spreading templet24 is illustrated by the drawings as shorter than the distance betweenthe forms 3 and 4 and the extent of vertical movement provided for bythe cranks 46 and 47 is suflieient to enable the spreading templet 24 tobe lowered between the forms or to be raised above the forms. \Vith sucha construction, the spreading templet 24 can be lowered between theforms to spread a sub-base of concrete for a brick or stone pavement, orfor receiving reinforcing members. or for any spreadin purpose whatever,and the spreading templet 24 can be raised to spread material to theheight of the forms or above. The vertical lift of the spreading templet24 should be sufficient so that it can be raised above the surface whichit has formed when spreading so as toclear the same and leave thesurface undisturbed when the machine is run back over a surface, forexample.

The reference numerals 57 and 58 designate plows, which'also serve asform cleaners, which are preferably yieldingly secured to the frame 1.These plows 57 and 58 extend from outside the forms, inwardly andbackwardly so as to be at all times, at their inner ends, ih front ofthe ends of the spreading templet 24, notwithstanding the fact that thespreading templet 24 is being reciprocated. The plows are secured topivoted U-shaped frames 59 and are yieldingly held down by spiralsprings 60 which surround links 61 and are held between collars 62 andbrace members 63. The links 61 have bent ends which pass through holesin the U- shaped frames 59 and may be held in place by cotter pins 64.The collars 62 may be held in position by cotter pins 65. The links 61pass through holes in the brace members 63 and are provided-with nuts 66to limit the downward movements of the plows, so that the plows can beset to just clean the forms without bearing or scrubbing on the form".The spreading templet 24 is provided with rakers 66 at each end whichincline inwardly and backwardly to prevent material being pushed outover the forms as the spreading templet is reciprocated and when it isworking at the height of the tops of the forms or above. \Vhen thespreading templet is working at the height of-the tops of the forms orabove, the rakers 66 are, in part, behind the plows 57 and 58, and itwill be evident that the spreading templet, as it is reciprocated,cannot push material oif over the forms. In other word's. the ends ofthe spreading templet cannot push material endwise because the plows andrakers move the material to points inside the ends of the spreadingtemplet. The plows 57 and 58 are provided with parts 67 to be contactedby the spreading templet 24 to lift the plows when the spreading templet24 is elevated t an out of the way position.

ill)

ltll) in all directions and its purpose is to scrape any pebbles, sandor cement mortar, or other obstructions, from the forms in advance ofthe smoothing templet 26 which is intended to ride accurately upon theforms. The form scraper 68 is illustrated by the drawings as composed ofa fiat plate 69 provided with elongated slots 70 for bolts 71 whlchadjustably secure it to spiral springs 72 bolted to a )iece of angleir0n 73 which is fastened to the frame 1.

The smoothing templet 26 is positioned lengthwise of the machine byradius rods 74 and 7 5 which are pivoted to the smoothing templet 26 andto eccentric-straps 76 and 77 by vertical pivots 78, 79, 80 and 81. Theeccentric-straps 7 6 and 7 7 surround eccentrics 82 and 83 which formconven ent crank members for tilting the smoothing templet 26. Theeccentrics 82 and 83 are fast on a shaft 84 which is supported by theframe of the machine, and it will be evidentthat by rocking the shaft 84the smoothing templet 26 can be placed flat, or horizontal, as shown byFig. 4 of the drawings, or one edge or the other can be tilted up, asshown by Figs. 5 and 6 of the drawings. The smoothing templet. 26, wheninuse, will be supported by the forms and, assuming a direction ofmovement of the machine to advance the smoothing templet 26 from lefttoright when looking at Figs. 4, 5 and 6 of the drawings, the smoothingtemplet may be kept flat as shown by Fig; 4, or its leading edge may beraised, as shown by Fig. 6, to smooth and compress. If the concreteshould be a trifle high, the smoothing templet 26 can be tilted with itsfollowing edge elevated, as shown by Fig. 5, so that its lead ing edgewill have a more pronounced pushing tendency and not tend to ride overthe concrete. It is not inaccurate to describe the ings, as a diggingtendency, bearing in mind, however, that the smoothing templet 26 isrestrained from downward movement by the.

forms upon which it rests, but that it could move downward to the formsif it were ele-' vated above the formsby concrete. The shaft 84 can berocked, and the smoothing templet 26 be tilted, by the hand levers 85and 86 which aresecured to the shaft 84 and which may be retained inselected positions by hand grips 87 and 88 which control pawls adaptedto engage in notches in sectors 89 and 90 which are fixed to the frameof the machine. One pawl can be retained disengaged from its sector by aring slip-over a hand lever and its hand grip in the manner already described in connection with the operating le-' vers and hand grips forthe spreading templet 24. Y

' The smoothing templet 26 can be raised from the forms and the.concrete and be supported from the frame 1 of the machine by chains 91and 92 which are attached thereto and to drums 93 and 94 which aresecured to a shaft 95 supported'by the frame 1 of the machine. The shaft95 can be rotated in any suitable or convenient manner and retained in apredetermined position, with the smoothing templet raised or elevated,by any suitable mechanism as, for example, a pawl, hand grip, and levermechanism, not

shown, coacting with a fixed sector 96 in the same manner as the shaft84 is operated, it being understood that the drums 93 and 94 with such aconstruction are large enough to wind up the chains 91 and 92 to theextent required .for the rocking movement which can be given tothe shaft95. WVhen the smoothing templet 26 is lowered onto the forms, the chains91 and 92 will be slack enough to permit the longitudinalreciprocatilonsdof the smoothing templet 26 contemate L The smoothingtemplet26 is illustrated by the drawing as being disposed obliquely tothe direction of movement of the machine,

or obliquely with respect to the forms 3 and 4, and, when the machine isin motion,

and fnoving in either direction, the smoothing templet 26 will tend tomove material sideways, and one of the objects of this invention is tomove material away from the forms towards the center of the road to keepbuilding up the crown of the road, or keep maintaining the crown of theroad. Both the spreading templet 24 and the smoothing templet 26 havetheir under surfaces arched or cambered to conform to the crown of theroad but it is difiicult to handle cement mortar without rubbing out thecrown of the road. The smoothing templet 26 is illustrated by thedrawings as composed of two planks 97 and 98, with a top 99 to preventmaterial from accidentally getting into the space between the planks. Abottom 100 is secured to the lower edges of the planks. As a matter ofconvenience I prefer to use channel iron for the bottom 100 as theflanges of the channel iron can be fastened to the planks by fastenings101, leaving thescrewthreaded bosses 106 are secured to the top 99 and ascrew 107, with right-hand threads atone end and with left-hand threadsat its other end is provided at each end to engage with thecorrespondingly screwthreaded bosses 105 and 106.

It is evident that by turning the screws 107 the ends 102 and 103 of thebottom can be moved away from the top 99 and the planks 97 and 98. Ifthe smoothing templet 26 is restin" upon the forms and a screw 107 isturned in the direction to separate the top and the bottom, the top 99and the planks at that end will be raised or elevated. Each screw 107 isprovided with a lever 108 for turning it and a rod 109 is also connectedwith the lever 108 and extends between the planks .97 and 98 to theopposite side of the machine so that both screws can be operated fromeither side of the machine. The operation is as follows. Looking at Fig.1 of the drawing and assuming that been turned to raise the right handend of the smoothing templet to render it inactive on the down slope ofthe crown of the road and the left hand half of the smoothing templetwilltend to crowd material away from the form 8 towards the center ofthe road and so lend to build up the crown of the road or maintain thecrown of the road. If the direction of the movement of the machine bereversed, the float 25 will be turned up out of contact with theconcrete, the screw at the right hand end of the smoothing templet willbe turned to lower that end of the templet and the screw at the-lefthand end of the smoothing templet will be turned to raise the left handend of the smoothing templet to .render it inactive. In this manner,first one side of the road can be operated upon and then the other andthe crown of the road be preserved.

The reference numerals 110 and 111 designate rakers connected to thesmoothing templet 26 to rake material away ,from the forms towards thecenter of the road. The rakerllO is illustrated as a triangular piece ofsheet metal with upturned edges 112, 113 and 114 and one upturned edgeis fastened to a flange of the end of the channel'bar bot- V tom 100.The size of the raker 110 should lower surface of the channel ironbottom 100. Anarm 120 is provided with an antifriction. roller 121 andthe frame 1' has. a

track member 122 pivoted to it by a pivot 123. The track member 122 isprovided with a track 124 which is bent downwardly at its outer end andwhich is shorter than the reciprocating stroke of the smoothing templet26. The track member 122 is extended beyond the pivot 123to form a stoparm 125 which projects under the frame 1 and prevents the track 124 frombeing depressed beroller 121 will be higher than the downwardly bent endof the track 124 and will ride up over the track 124, lifting the teeth116, 117 and 118, so that there will be no possibility of the teethcontacting with any material which might be otherwise contacted with.When the smoothing templet 26 has nearly'reached the limit of itsmovement to the right, the antifriction roller 121 will reach the end ofthe track 124 and drop over the end 'of the same" letting the raker 111drop against the stop 119.- On the reciprocation of the smoothingtemplet 26 in the opoosite direction, the antifriction roller 121 willrun under the track 124 and will elevate thesame when the downwardlybent end of the track is reached and pass into the clear. The trackmember 122 will drop until its stop arm 125 contacts with the frame 1,and the parts will'then be in position for re peating the cycle ofoperations. The action of the raker 111 will be to lift over and rakeback towards the centenof the road.

The action of the raker 110 will be to rake material, which may be high,towards the center of the road and there will be no tendency to pushmaterial over the form because the edge 114 is never inside the form.

The reference numeral 126 designates a skid-jack which is now well knownand does not need to be specifically described here.

The operation of the machine will be readil understood from theforegoing descriptlon. The spreading templet 24 can be lowered betweenthe forms for the purposes described, or can be set at the level of theforms, or above the level of the forms. When the spreading templet 24 israised to its extreme position, the plows 57 and 58 will be lifted. henthe machine is being run backward, the float or finisher 25, and itsframe '27, will be turned up in the customary manner. The screws 107 donot fit within the bosses 105 and 106 so tightly as to prevent warpingor twisting of the ends of the bottom 100 of the smoothing templet 26and these ends will lie flat on the forms and the raker 110 will alsolie flat on the form.

The trailing end of: the smoothing tem-' plet 26 will be raised by itsscrew 107 to render the part of the smoothing templet over the downslope from the crown inactive While'the leading end of the smoothingtemplet will incline according to the crown on its side of the road andwill hug the form on its side of the road.

The under side of the spreading templet 24, While arched to the crown ofthe road, 1s preferablyv flat or horizontal lengthwise of the roadso asto act also as a smoothing templet. In other words, its front lower edgewill determine a'surface by spreading action while its under surfacewill act with a smoothing action upon the surface made or determined.This is of special importance when the spreading templet is being usedon concrete below the level of the tops of the forms.

lVhat is claimed is:

1. The combination with a smoothing templet adapted to engage with formsat both ends'and to be reciprocated longitudinally of itself, of meansfor rendering a part only of said templet inactive.

2. The combination with a smoothing templet adapted to be reciprocatedlongitudinally of itself, and'provided with means to contact with forms,of means for elevating one end of the templet while leaving the otherend of the templet in. position to work on the other side of a road.

3. The combination in a smoothing templet, of a rigid part adapted tocontact with and Work upon the concrete a relatively movable end part,and means to adjust said parts vertically with relation to each other.

4. The combination in a concrete road finishing machine, of a smoothingtemplet including a rigid part, adapted to contact with and workconcrete, and an end part relatively movable vertically with respect tosaid rigid part, means to vary the relative positions of said parts, andmeans. to reciprocate said templet longitudinally of itself.

5. The combination with a smoothing templet, of means to reciprocate thetemplet longitudinally of itself, and means for tilting the templettransversely with respect to its length so as to work upon concrete withan edge of the templet.

6. The combination in a concrete road finishing machine, of a smoothingtempl t,

means to reciprocate the templet longitudinally of itself, and rakers tomove material towards the center of a road.

7. The combination in a concrete road finishing machine, of a smoothingtemplet, means for reciprocating the templet lon itudinally of itself, araker,-and means or elevating the raker when the templet is moving inone direction.

8. The combination in a concrete road finishing machine, of a smoothingtem let, radius rods, means for reciprocating t e emplet longitudinallyof itself, means for raising an end of the templet independently of theother end, means for tilting the templet transversely of itself so as towork concrete with an edge of the templet, andmeans for elevating thetemplet from the forms.

9. The combination in a concrete road finishing machine, of areciprocatablespreading templet, a reciprocatable smoothing templet, anda reciprocatable float or finisher, in such close relationship to eachother that the concrete is in the same unset plastic condition under thesmoothing templet and the float or finisher as when it has been passedby the spreading templet.

10. The combination in a. concrete road finishing machine, of plows, areciprocatable spreading templet, an oblique reciprocatable smoothingtemplet adapted to rest upon the forms, means for tilting the smoothingtemplet, means, for rendering a part of the smoothing templet inactive,a float or finish- -er, and means for reciprocating the spreadingtemplet. the smoothing templet and the float or finisher.

11. The combination with a concrete road finishing machine, of a formcleaner plate, spiral springs for supporting the cleaner plate from themachine, and means for adjusting the form cleaner to the form.

12. The combination with a frame adapted to be supported by forms, of areciprocatable spreading templet of less length than the width betweenthe forms, and means for setting the. spreading templet to difl'erentelevations.

13. The combination with a frame adapted to be supported by forms, of areciprocatable spreading and smoothing templet of less length than thedistance between the forms, rakersat the ends of the templet, means forreciprocating the templet longitudinally of itself, and means forchanging the elevation of the templet.

I 14. The combination with a frame adapted to be supported by forms, ofa reciprooatable spreading templet, plows. means to reciprocate thespreading templet, means to chan e the elevation of the spreadingtemplet and to elevate the plows.

15. The combination with a concrete road finishing machine, of pivotedplows, means for limiting the movements of the plows towards the forms,and yieldable means for normally holding the plows in predeterminedositions.

In witness whereof I hereto afiix my signature.

EDWARD G. CARR.

plate with respect 7 ill) CERTIFICATE OF CORRECTION.

Patent No. 1,611,412 granted December 21, 1926.

to EDWARD G. 0mm.

It is hereby certified that error appears in the printed specificationof the above mentioned patent requiring correction as follows: Page 2line 111, for the numeral "66" read "660" and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed this 15th day of February,- A. D. 1927.

William A. Kinnan,

Seal. Acting Commissioner of Patents

